:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-soft: #eef2ff;
    --accent: #8b5cf6;
    --accent-2: #ec4899;
    --teal: #06b6d4;
    --success: #10b981;
    --success-soft: #d1fae5;
    --danger: #ef4444;
    --danger-soft: #fee2e2;
    --warning: #f59e0b;
    --bg: #f5f3ff;
    --surface: #ffffff;
    --surface-tint: #fafaff;
    --border: #e2e8f0;
    --border-soft: #eef0f7;

    /* Feature palette */
    --theme-dashboard: linear-gradient(135deg, #4f46e5 0%, #8b5cf6 50%, #ec4899 100%);
    --theme-interview: linear-gradient(135deg, #ec4899 0%, #a855f7 100%);
    --theme-interview-soft: rgba(236, 72, 153, 0.1);
    --theme-wordbank: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
    --theme-wordbank-soft: rgba(16, 185, 129, 0.1);
    --theme-vocabulary: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --theme-vocabulary-soft: rgba(245, 158, 11, 0.12);
    --theme-topics: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
    --theme-topics-soft: rgba(79, 70, 229, 0.1);
    --theme-chat: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --theme-chat-soft: rgba(6, 182, 212, 0.12);
    --theme-quiz: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    --theme-quiz-soft: rgba(139, 92, 246, 0.1);
    --text: #0f172a;
    --text-muted: #64748b;
    --text-soft: #94a3b8;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow: 0 4px 12px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.08), 0 2px 8px rgba(15, 23, 42, 0.04);
    --radius: 14px;
    --radius-sm: 10px;
    --radius-lg: 20px;
    --nav-h: 60px;
    --bnav-h: 72px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background:
        radial-gradient(1000px 600px at -10% -10%, rgba(139, 92, 246, 0.35), transparent 55%),
        radial-gradient(900px 550px at 110% 10%, rgba(79, 70, 229, 0.28), transparent 55%),
        radial-gradient(800px 500px at 105% 85%, rgba(236, 72, 153, 0.22), transparent 55%),
        radial-gradient(900px 500px at -5% 95%, rgba(6, 182, 212, 0.22), transparent 55%),
        radial-gradient(700px 400px at 50% 50%, rgba(255, 255, 255, 0.5), transparent 70%),
        var(--bg);
    background-attachment: fixed;
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 15px;
    line-height: 1.5;
    position: relative;
    min-height: 100vh;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background-image:
        radial-gradient(circle at 15% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 3%),
        radial-gradient(circle at 85% 70%, rgba(236, 72, 153, 0.12) 0%, transparent 3%),
        radial-gradient(circle at 60% 15%, rgba(6, 182, 212, 0.12) 0%, transparent 2.5%),
        radial-gradient(circle at 25% 80%, rgba(79, 70, 229, 0.12) 0%, transparent 2.5%);
    background-size: 120px 120px, 160px 160px, 100px 100px, 140px 140px;
    opacity: 0.8;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.25;
    margin: 0 0 0.5rem;
    letter-spacing: -0.01em;
}
h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.15rem; }
h4 { font-size: 1rem; }

p { margin: 0 0 1rem; color: var(--text-muted); }
small { color: var(--text-muted); font-size: 0.85rem; }

/* === LAYOUT === */

.topbar {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: saturate(180%) blur(18px);
    -webkit-backdrop-filter: saturate(180%) blur(18px);
    border-bottom: 1px solid rgba(139, 92, 246, 0.12);
    height: var(--nav-h);
    box-shadow: 0 1px 20px -10px rgba(79, 70, 229, 0.25);
}

.topbar-inner {
    max-width: 960px; margin: 0 auto;
    padding: 0 1rem;
    height: 100%;
    display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}

.brand {
    display: flex; align-items: center; gap: 0.5rem;
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--text);
    letter-spacing: -0.02em;
}

.brand-logo {
    font-size: 1.3rem;
    filter: drop-shadow(0 2px 4px rgba(79, 70, 229, 0.2));
}

.brand-dot { color: var(--primary); }

.brand-img {
    height: 34px;
    width: auto;
    object-fit: contain;
    display: block;
}

.topnav { display: none; gap: 0.25rem; }

.topnav-link {
    color: var(--text-muted);
    padding: 0.45rem 0.85rem;
    border-radius: 10px;
    font-weight: 500;
    font-size: 0.92rem;
    transition: all 0.15s;
}

.topnav-link:hover { background: rgba(139, 92, 246, 0.08); color: var(--primary); }
.topnav-link.active {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.12), rgba(139, 92, 246, 0.12));
    color: var(--primary);
    font-weight: 600;
    box-shadow: inset 0 -2px 0 0 var(--accent);
}

.main {
    max-width: 960px; margin: 0 auto;
    padding: 1.25rem 1rem calc(var(--bnav-h) + 2rem);
    min-height: calc(100vh - var(--nav-h));
    position: relative;
    z-index: 1;
}

/* === BOTTOM NAV (mobile) === */

.bottomnav {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 50;
    display: flex; justify-content: space-around;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-top: 1px solid var(--border-soft);
    padding: 0.5rem 0.25rem calc(0.5rem + env(safe-area-inset-bottom));
    height: var(--bnav-h);
}

.bn-item {
    flex: 1;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 3px;
    color: var(--text-soft);
    font-size: 0.65rem;
    font-weight: 500;
    padding: 0.2rem 0.1rem;
    border-radius: 10px;
    transition: all 0.15s;
    min-width: 0;
    text-align: center;
    white-space: nowrap;
}

.bn-item svg { width: 20px; height: 20px; stroke-width: 2; flex-shrink: 0; }
.bn-item span { overflow: hidden; text-overflow: ellipsis; max-width: 100%; }

.bn-item.active { color: var(--primary); }
.bn-item.active svg { stroke-width: 2.4; }

/* === BUTTONS === */

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
    padding: 0.7rem 1.2rem;
    border-radius: 12px;
    border: 1px solid transparent;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.25s ease, filter 0.18s ease;
    text-decoration: none;
    font-family: inherit;
    line-height: 1.2;
    box-shadow: 0 4px 14px -4px rgba(79, 70, 229, 0.35);
}

.btn:hover {
    color: white;
    transform: translateY(-1px);
    filter: brightness(1.06);
    box-shadow: 0 8px 22px -6px rgba(79, 70, 229, 0.5), 0 3px 8px -2px rgba(139, 92, 246, 0.35);
}
.btn:active { transform: translateY(0); filter: brightness(0.98); }

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border);
}
.btn-secondary:hover { background: var(--primary-soft); color: var(--primary); border-color: var(--primary-soft); }

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border-color: transparent;
}
.btn-ghost:hover { background: var(--border-soft); color: var(--text); }

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #f87171 100%);
    box-shadow: 0 4px 14px -4px rgba(239, 68, 68, 0.4);
}
.btn-danger:hover { color: white; box-shadow: 0 8px 22px -6px rgba(239, 68, 68, 0.55); }

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #34d399 100%);
    box-shadow: 0 4px 14px -4px rgba(16, 185, 129, 0.4);
}
.btn-success:hover { color: white; box-shadow: 0 8px 22px -6px rgba(16, 185, 129, 0.55); }

.btn-sm { padding: 0.45rem 0.8rem; font-size: 0.85rem; border-radius: 10px; }
.btn-lg { padding: 0.9rem 1.5rem; font-size: 1rem; border-radius: 14px; }

.btn-block { display: flex; width: 100%; }

.btn-row { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* === FORMS === */

input[type="text"], input[type="search"], input[type="email"],
input[type="password"], textarea, select {
    width: 100%;
    padding: 0.75rem 0.95rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    font-family: inherit;
    font-size: 1rem;
    color: var(--text);
    transition: all 0.15s;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

textarea { resize: vertical; min-height: 120px; line-height: 1.6; }

label {
    display: block;
    margin-bottom: 1rem;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text);
}

label input, label textarea, label select { margin-top: 0.3rem; }

/* === CARDS === */

.card {
    position: relative;
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(250, 248, 255, 0.95));
    border: 1px solid rgba(139, 92, 246, 0.1);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: 0 2px 8px rgba(79, 70, 229, 0.06), 0 1px 3px rgba(15, 23, 42, 0.04);
    backdrop-filter: blur(10px);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.card:hover {
    box-shadow: 0 14px 36px -14px rgba(79, 70, 229, 0.32), 0 4px 14px -4px rgba(139, 92, 246, 0.18);
    border-color: rgba(139, 92, 246, 0.28);
    transform: translateY(-1px);
}

.card-title { font-size: 1rem; font-weight: 700; margin: 0 0 0.75rem; }

/* === HERO === */

.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    padding: 1.75rem 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 30px rgba(79, 70, 229, 0.25);
    margin-bottom: 1.5rem;
}

.hero h1 { color: white; margin-bottom: 0.25rem; }
.hero p { color: rgba(255, 255, 255, 0.85); margin: 0; }

.hero-subtitle { font-size: 0.95rem; opacity: 0.9; }

.hero-cta-pulse {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.85rem 1.25rem;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 14px;
    color: white;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
    white-space: nowrap;
    overflow: hidden;
    box-shadow: 0 6px 22px -8px rgba(0, 0, 0, 0.25);
}

.hero-cta-pulse::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        110deg,
        transparent 30%,
        rgba(255, 255, 255, 0.18) 45%,
        rgba(255, 255, 255, 0.35) 50%,
        rgba(255, 255, 255, 0.18) 55%,
        transparent 70%
    );
    transform: translateX(-100%);
    animation: hero-cta-shimmer 3.2s ease-in-out infinite;
    pointer-events: none;
}

.hero-cta-pulse:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.55);
    transform: translateY(-1px);
}

.hero-cta-pulse:hover::before { animation-duration: 1.6s; }

.hero-cta-icon {
    flex-shrink: 0;
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
}

.hero-cta-icon svg {
    width: 20px;
    height: 20px;
    stroke: white;
    stroke-width: 2;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.hero-cta-text { display: flex; flex-direction: column; gap: 0.15rem; line-height: 1.2; position: relative; z-index: 1; }
.hero-cta-title { font-size: 0.95rem; font-weight: 700; letter-spacing: -0.01em; }
.hero-cta-sub { font-size: 0.78rem; opacity: 0.82; font-weight: 500; }

@keyframes hero-cta-shimmer {
    0% { transform: translateX(-100%); }
    60%, 100% { transform: translateX(120%); }
}

@media (max-width: 640px) {
    .hero-cta-pulse { width: 100%; justify-content: flex-start; }
}

/* === RESPONSIVE: feature-hero, stat-tile, feature-card === */

@media (max-width: 480px) {
    .feature-hero {
        padding: 1.1rem 1.15rem;
    }
    .feature-hero-title { font-size: 1.25rem; }
    .feature-hero-sub { font-size: 0.85rem; }
    .feature-hero-icon { width: 42px; height: 42px; font-size: 1.35rem; }
    .feature-hero-meta { font-size: 0.72rem; padding: 0.28rem 0.6rem; }

    .stat-tile { min-height: 80px; padding: 0.8rem 0.85rem; }
    .stat-tile-value { font-size: 1.55rem; }
    .stat-tile-label { font-size: 0.68rem; }
    .stat-tile-sub { font-size: 0.72rem; }

    .feature-card { padding: 0.9rem 1rem; gap: 0.7rem; }
    .feature-card-title { font-size: 0.92rem; }
    .feature-card-sub { font-size: 0.76rem; }
    .feature-card-icon { width: 38px; height: 38px; }
    .feature-card-icon svg { width: 18px; height: 18px; }
    .feature-card-arrow { width: 28px; height: 28px; font-size: 0.95rem; }

    .hero { padding: 1.25rem 1rem; }
    .hero h1 { font-size: 1.2rem; }
    .hero-subtitle { font-size: 0.85rem; }
    .hero-cta-pulse { padding: 0.7rem 0.95rem; }
    .hero-cta-title { font-size: 0.88rem; }
    .hero-cta-sub { font-size: 0.72rem; }

    .page-header h2, .page-header.theme-interview h2,
    .page-header.theme-wordbank h2, .page-header.theme-vocabulary h2,
    .page-header.theme-topics h2, .page-header.theme-chat h2,
    .page-header.theme-quiz h2 { font-size: 1.25rem; }

    h1 { font-size: 1.45rem; }
    h2 { font-size: 1.25rem; }

    .main { padding: 1rem 0.85rem calc(var(--bnav-h) + 1.5rem); }
}

/* Very narrow (iPhone SE, 320px) */
@media (max-width: 360px) {
    .stats-grid { grid-template-columns: 1fr; }
    .feature-hero-row { gap: 0.6rem; }
    .feature-hero-meta { order: 3; }
}

/* === STATS GRID === */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.stat {
    position: relative;
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.96), rgba(245, 243, 255, 0.96));
    border: 1px solid rgba(139, 92, 246, 0.12);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: 0 2px 10px rgba(79, 70, 229, 0.08);
    overflow: hidden;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.stat::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent), var(--accent-2));
    background-size: 200% 100%;
    animation: progress-flow 4s linear infinite;
    transition: height 0.25s ease;
}

.stat::after {
    content: '';
    position: absolute;
    top: -20px; right: -20px;
    width: 80px; height: 80px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.12), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.stat:nth-child(2)::before { background: linear-gradient(90deg, var(--teal), var(--primary), var(--accent)); background-size: 200% 100%; }
.stat:nth-child(2)::after { background: radial-gradient(circle, rgba(6, 182, 212, 0.12), transparent 70%); }
.stat:nth-child(3)::before { background: linear-gradient(90deg, var(--success), #34d399, var(--teal)); background-size: 200% 100%; }
.stat:nth-child(3)::after { background: radial-gradient(circle, rgba(16, 185, 129, 0.12), transparent 70%); }
.stat:nth-child(4)::before { background: linear-gradient(90deg, var(--warning), #fbbf24, var(--accent-2)); background-size: 200% 100%; }
.stat:nth-child(4)::after { background: radial-gradient(circle, rgba(245, 158, 11, 0.14), transparent 70%); }

.stat:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 32px -10px rgba(79, 70, 229, 0.3);
}

.stat:hover::before { height: 5px; }

.stat-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 600;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text);
    line-height: 1.1;
    margin-top: 0.35rem;
    letter-spacing: -0.02em;
}

.stat-sub { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.25rem; }

/* === ACTIONS GRID === */

.actions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.action-card {
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 1.1rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: all 0.2s;
    color: var(--text);
}

.action-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    border-color: var(--primary-soft);
    color: var(--text);
}

.action-card-icon {
    width: 42px; height: 42px;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 1.25rem;
}

.action-card-icon.success { background: var(--success-soft); color: var(--success); }
.action-card-icon.accent { background: #f3e8ff; color: var(--accent); }
.action-card-icon.warning { background: #fef3c7; color: var(--warning); }

.action-card-title { font-weight: 700; font-size: 0.95rem; }
.action-card-desc { font-size: 0.8rem; color: var(--text-muted); }

/* === PROGRESS BAR === */

.progress {
    background: var(--border-soft);
    height: 8px;
    border-radius: 100px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.progress-fill {
    position: relative;
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
    background-size: 200% 100%;
    border-radius: 100px;
    transition: width 0.5s ease;
    animation: progress-flow 3s linear infinite;
    overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255,255,255,0.35) 50%,
        transparent 100%
    );
    transform: translateX(-100%);
    animation: progress-shimmer 2.5s ease-in-out infinite;
}

.progress.success .progress-fill {
    background: linear-gradient(90deg, var(--success), #34d399, var(--success));
    background-size: 200% 100%;
}

@keyframes progress-flow {
    from { background-position: 200% 0; }
    to   { background-position: 0% 0; }
}

@keyframes progress-shimmer {
    0%   { transform: translateX(-100%); }
    60%, 100% { transform: translateX(120%); }
}

/* === PAGE HEADER === */

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
}

.page-header h2 {
    margin: 0;
    background: linear-gradient(135deg, var(--primary), var(--accent) 60%, var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* === LISTS === */

.list { display: flex; flex-direction: column; gap: 0.5rem; }

.list-item {
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 0.9rem 1rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
}

/* === WORD CARD === */

.word-card {
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 0.5rem;
}

.word-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.word-en { font-weight: 700; font-size: 1.05rem; color: var(--text); }
.word-tr { color: var(--primary); font-weight: 500; font-size: 0.95rem; }

.word-example {
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px dashed var(--border-soft);
    font-size: 0.85rem;
}
.word-example .en { color: var(--text); }
.word-example .tr { color: var(--text-muted); font-style: italic; }

.word-actions { display: flex; gap: 0.35rem; margin-top: 0.5rem; }

/* === TOPIC CARD === */

.topic-card {
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 1rem 1.1rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    transition: all 0.15s;
}

.topic-card:hover {
    box-shadow: 0 10px 26px -12px rgba(79, 70, 229, 0.25), 0 3px 8px -2px rgba(139, 92, 246, 0.12);
    border-color: rgba(139, 92, 246, 0.2);
    transform: translateY(-1px);
}
.topic-card.done { border-left: 4px solid var(--success); }

.topic-name { font-weight: 600; font-size: 0.98rem; color: var(--text); }
.topic-name:hover { color: var(--primary); }

/* === EXAMPLE GROUPS === */

.example-group { margin: 1.5rem 0; }

.example-heading {
    display: flex; align-items: center; gap: 0.5rem;
    font-size: 0.95rem; font-weight: 700;
    margin-bottom: 0.75rem;
}

.example-heading.pos { color: var(--success); }
.example-heading.neg { color: var(--danger); }
.example-heading.q { color: var(--primary); }

.example-heading .dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: currentColor;
}

.example-item {
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-left: 3px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.75rem 0.9rem;
    margin-bottom: 0.5rem;
}

.example-item.pos { border-left-color: var(--success); }
.example-item.neg { border-left-color: var(--danger); }
.example-item.q { border-left-color: var(--primary); }

.example-item .en { color: var(--text); font-weight: 500; font-size: 0.95rem; }
.example-item .tr { color: var(--text-muted); font-size: 0.85rem; margin-top: 0.2rem; }

/* === BADGE === */

.badge {
    display: inline-flex; align-items: center; gap: 0.3rem;
    padding: 0.2rem 0.6rem;
    border-radius: 100px;
    font-size: 0.72rem;
    font-weight: 600;
    background: var(--border-soft);
    color: var(--text-muted);
    letter-spacing: 0.01em;
}

.badge-primary { background: var(--primary-soft); color: var(--primary); }
.badge-success { background: var(--success-soft); color: var(--success); }
.badge-danger { background: var(--danger-soft); color: var(--danger); }

/* === QUIZ === */

.quiz-wrap { max-width: 560px; margin: 0 auto; }

.quiz-topbar {
    display: flex; justify-content: space-between; align-items: center;
    font-size: 0.82rem; color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.quiz-score {
    display: flex; gap: 0.8rem;
}
.quiz-score .good { color: var(--success); font-weight: 700; }
.quiz-score .bad { color: var(--danger); font-weight: 700; }

.quiz-card {
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    padding: 1.5rem 1.25rem;
    box-shadow: var(--shadow);
    margin-top: 1rem;
}

.quiz-type-chip {
    display: inline-block;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.2rem 0.7rem;
    border-radius: 100px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.quiz-prompt {
    font-size: 1.15rem;
    font-weight: 600;
    line-height: 1.5;
    color: var(--text);
    margin-bottom: 1.25rem;
}

.choice {
    display: block;
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 0.85rem 1rem;
    margin-bottom: 0.5rem;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.15s;
}

.choice:hover { border-color: var(--primary); background: var(--primary-soft); }

.choice input { margin-right: 0.6rem; }

.choice input:checked ~ * { color: var(--primary); }

.feedback-box {
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 1rem 1.1rem;
    margin-top: 1rem;
}

.feedback-box.correct { border-left: 4px solid var(--success); background: var(--success-soft); }
.feedback-box.wrong { border-left: 4px solid var(--danger); background: var(--danger-soft); }

.feedback-label { font-weight: 700; font-size: 0.95rem; }
.feedback-box.correct .feedback-label { color: #065f46; }
.feedback-box.wrong .feedback-label { color: #991b1b; }

/* === CHAT === */

.chat-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 1rem;
    max-width: 1080px;
    margin: 0 auto;
}

.chat-sidebar {
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - var(--nav-h) - var(--bnav-h) - 2rem);
}

.chat-sidebar-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--border-soft);
    background: var(--bg);
}

.chat-history {
    overflow-y: auto;
    padding: 0.35rem;
}

.chat-history-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.4rem 0.5rem;
    border-radius: 10px;
    position: relative;
}

.chat-history-item:hover { background: var(--border-soft); }
.chat-history-item.active { background: linear-gradient(135deg, rgba(99,102,241,.1), rgba(139,92,246,.1)); }

.chat-history-link {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    min-width: 0;
    text-decoration: none;
    color: var(--text);
}

.chat-history-title {
    font-size: 0.88rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-history-actions {
    display: flex;
    gap: 0.1rem;
    opacity: 0;
    transition: opacity .12s;
}

.chat-history-item:hover .chat-history-actions,
.chat-history-item.active .chat-history-actions { opacity: 1; }

.chat-rename-form {
    display: none;
    width: 100%;
    gap: 0.25rem;
    margin-top: 0.4rem;
}

.chat-rename-form.show { display: flex; }
.chat-rename-form input { flex: 1; padding: 0.3rem 0.5rem; font-size: 0.85rem; }

.chat-sidebar-toggle { display: none; }

.chat-wrap {
    display: flex; flex-direction: column;
    height: calc(100vh - var(--nav-h) - var(--bnav-h) - 2rem);
    max-height: 900px;
    min-width: 0;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem;
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    margin-bottom: 0.75rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.chat-msg {
    padding: 0.7rem 0.95rem;
    border-radius: 16px;
    max-width: 85%;
    white-space: pre-wrap;
    font-size: 0.92rem;
    line-height: 1.5;
    word-wrap: break-word;
}

.chat-msg.user {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 6px;
}

.chat-msg.assistant {
    background: var(--border-soft);
    color: var(--text);
    align-self: flex-start;
    border-bottom-left-radius: 6px;
}

.chat-form {
    display: flex;
    gap: 0.5rem;
}

.chat-form input { flex: 1; }

/* === FLASH === */

.flash-wrap { margin-bottom: 1rem; }

.flash {
    padding: 0.7rem 1rem;
    border-radius: 12px;
    margin-bottom: 0.4rem;
    font-size: 0.92rem;
    font-weight: 500;
    border: 1px solid;
}

.flash-error, .flash-danger { background: var(--danger-soft); color: #991b1b; border-color: #fca5a5; }
.flash-success { background: var(--success-soft); color: #065f46; border-color: #6ee7b7; }
.flash-info { background: var(--primary-soft); color: var(--primary-dark); border-color: #c7d2fe; }

/* === UTILS === */

.muted { color: var(--text-muted); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }
.text-center { text-align: center; }

.section-title {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-soft);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin: 1.5rem 0 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.section-title::before {
    content: '';
    width: 18px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
}

.divider {
    height: 1px;
    background: var(--border-soft);
    margin: 1.25rem 0;
}

.empty {
    text-align: center;
    padding: 2.5rem 1rem;
    color: var(--text-muted);
}

.empty-icon { font-size: 2.5rem; margin-bottom: 0.5rem; }

/* === SEARCH === */

.searchbar {
    position: relative;
    margin-bottom: 1rem;
}

.searchbar input {
    padding-left: 2.5rem;
}

.searchbar svg {
    position: absolute; left: 0.9rem; top: 50%; transform: translateY(-50%);
    width: 18px; height: 18px;
    color: var(--text-soft);
    pointer-events: none;
}

/* === WORDBANK LEVEL CARDS === */

.level-card {
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.25rem 1rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 0.75rem;
    border-left: 4px solid var(--primary);
    transition: all 0.15s;
}

.level-card:hover { box-shadow: var(--shadow); }

.level-card.level-a1 { border-left-color: var(--success); }
.level-card.level-a2 { border-left-color: #3b82f6; }
.level-card.level-b1 { border-left-color: var(--primary); }
.level-card.level-b2 { border-left-color: var(--accent); }
.level-card.level-c1 { border-left-color: #f97316; }
.level-card.level-c2 { border-left-color: var(--danger); }

.level-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.level-code {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text);
    line-height: 1;
}
.level-card.level-a1 .level-code { color: var(--success); }
.level-card.level-a2 .level-code { color: #3b82f6; }
.level-card.level-b1 .level-code { color: var(--primary); }
.level-card.level-b2 .level-code { color: var(--accent); }
.level-card.level-c1 .level-code { color: #f97316; }
.level-card.level-c2 .level-code { color: var(--danger); }

.level-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
}

.level-percent {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text);
    line-height: 1;
    letter-spacing: -0.02em;
}

.level-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin: 0.75rem 0;
}

.stat-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.65rem;
    border-radius: 100px;
    background: var(--border-soft);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
}

.stat-chip-success { background: var(--success-soft); color: var(--success); }
.stat-chip-warning { background: #fef3c7; color: var(--warning); }

.level-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.retry-chip {
    display: inline-block;
    background: var(--warning);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.2rem 0.6rem;
    border-radius: 100px;
    letter-spacing: 0.05em;
}

.bank-word {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text);
    line-height: 1.1;
}

.bank-pos {
    font-style: italic;
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-top: 0.15rem;
}

.bank-example {
    margin-top: 0.85rem;
    padding: 0.75rem 0.95rem;
    background: var(--primary-soft);
    color: var(--text);
    border-radius: 10px;
    font-style: italic;
    font-size: 0.92rem;
    line-height: 1.5;
}

/* === BANK DASHBOARD BANNER === */

.bank-banner {
    position: relative;
    background: linear-gradient(135deg, #10b981 0%, #059669 60%, #0891b2 100%);
    color: white;
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.28);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    overflow: hidden;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.bank-banner::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        110deg,
        transparent 40%,
        rgba(255, 255, 255, 0.18) 50%,
        transparent 60%
    );
    transform: translateX(-100%);
    animation: hero-cta-shimmer 4.5s ease-in-out infinite;
    pointer-events: none;
}

.bank-banner:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 34px rgba(16, 185, 129, 0.38);
}

.bank-banner-icon {
    font-size: 2rem;
    line-height: 1;
}

.bank-banner-body { flex: 1; min-width: 200px; }

.bank-banner-title {
    font-weight: 700;
    font-size: 1.05rem;
}

.bank-banner-sub {
    opacity: 0.9;
    font-size: 0.85rem;
    margin-top: 0.15rem;
}

.bank-banner-progress {
    height: 6px;
    background: rgba(255, 255, 255, 0.25);
    border-radius: 100px;
    overflow: hidden;
    margin-top: 0.6rem;
}

.bank-banner-progress > div {
    height: 100%;
    background: white;
    border-radius: 100px;
}

.bank-banner .btn {
    background: white;
    color: var(--primary);
}
.bank-banner .btn:hover { background: var(--bg); color: var(--primary-dark); }

/* === AUTH SHELL === */

.auth-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem 1rem;
    background: linear-gradient(135deg, #eef2ff 0%, #f3e8ff 100%);
}

.auth-shell {
    width: 100%;
    max-width: 420px;
}

.auth-card {
    background: var(--surface);
    padding: 1.75rem 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-soft);
}

/* === USER CHIP === */

.user-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.7rem 0.35rem 0.35rem;
    border-radius: 100px;
    background: var(--primary-soft);
    color: var(--primary);
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.15s;
}

.user-chip:hover { background: var(--primary); color: white; }

.user-avatar {
    width: 26px; height: 26px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.78rem;
    text-transform: uppercase;
}

.user-chip:hover .user-avatar { background: white; color: var(--primary); }

.logout-form { display: inline; margin: 0; }
.logout-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.3rem 0.6rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-family: inherit;
}
.logout-btn:hover { background: var(--danger-soft); color: var(--danger); }

/* === USER MENU (dropdown) === */
.user-menu { position: relative; display: inline-block; }
.user-menu-trigger {
    background: transparent;
    border: 1px solid transparent;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.88rem;
}
.user-menu-trigger:hover { background: var(--border-soft); }
.user-chip-name {
    display: none;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.user-chip-caret { transition: transform 0.15s; opacity: 0.7; }
.user-menu.is-open .user-chip-caret { transform: rotate(180deg); }

.user-menu-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 240px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    padding: 0.4rem;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: all 0.15s ease;
}
.user-menu.is-open .user-menu-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.user-menu-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0.85rem;
    border-bottom: 1px solid var(--border-soft);
    margin-bottom: 0.3rem;
}
.user-menu-name {
    font-weight: 700;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.user-menu-sub {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 0.1rem;
}
.user-menu-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    width: 100%;
    padding: 0.55rem 0.85rem;
    border-radius: 8px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    color: var(--text);
    text-decoration: none;
    text-align: left;
}
.user-menu-item:hover { background: var(--border-soft); }
.user-menu-item svg { flex-shrink: 0; color: var(--text-muted); }
.user-menu-item-danger { color: var(--danger); }
.user-menu-item-danger:hover { background: var(--danger-soft); }
.user-menu-item-danger svg { color: var(--danger); }
.user-menu-divider {
    height: 1px;
    background: var(--border-soft);
    margin: 0.3rem 0;
}
.user-menu-logout { margin: 0; display: block; }

@media (min-width: 640px) {
    .user-chip-name { display: inline; }
}

.lang-switcher { display: inline; margin: 0; }
.lang-btn {
    background: var(--border-soft);
    border: 1px solid var(--border);
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    font-family: inherit;
    letter-spacing: 0.03em;
    transition: all 0.15s;
}
.lang-btn:hover { background: var(--primary-soft); color: var(--primary); border-color: var(--primary-soft); }

/* === LANDING PAGE === */

.landing-body { margin: 0; background: var(--bg); min-height: 100vh; overflow-x: hidden; }

/* Nav */
.landing-nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(255,255,255,0.85);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid var(--border-soft);
    height: 56px;
}
.landing-nav-inner { max-width: 960px; margin: 0 auto; padding: 0 1rem; height: 100%; display: flex; align-items: center; justify-content: space-between; }
.landing-nav-logo { height: 32px; }
.landing-nav-right { display: flex; align-items: center; gap: 0.5rem; }
.landing-nav-login { background: transparent; color: var(--text-muted); border: none; }
.landing-nav-login:hover { background: var(--primary-soft); color: var(--primary); }

/* Shared */
.l-container { max-width: 960px; margin: 0 auto; padding: 0 1.25rem; }
.l-container-narrow { max-width: 720px; }
.l-section { padding: 3.5rem 0; }
.l-section-alt { background: var(--border-soft); }
.l-eyebrow {
    display: inline-block;
    font-size: 0.82rem; font-weight: 600; color: var(--primary);
    letter-spacing: 0.01em;
}
.l-section-head { text-align: center; margin-bottom: 2.5rem; }
.l-section-head h2 { font-size: 1.6rem; font-weight: 800; letter-spacing: -0.02em; margin: 0.6rem 0 0.35rem; }
.l-section-head p { color: var(--text-muted); margin: 0; font-size: 0.95rem; }
.l-highlight { color: var(--primary); }

/* Animations */
.fade-up { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.is-visible { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Hero */
.l-hero-section { padding-top: 5rem; }
.l-hero-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; align-items: center; }
.l-hero-title { font-size: clamp(1.6rem, 4.5vw, 2.6rem); font-weight: 800; letter-spacing: -0.02em; line-height: 1.2; margin: 0.75rem 0 0.75rem; }
.l-hero-desc { font-size: 1rem; color: var(--text-muted); margin: 0 0 1.5rem; line-height: 1.6; max-width: 500px; }
.l-hero-ctas { display: flex; gap: 0.6rem; flex-wrap: wrap; }

.landing-btn-primary {
    background: var(--primary); color: white !important; font-weight: 700; padding: 0.85rem 1.75rem;
    box-shadow: 0 4px 20px rgba(79,70,229,0.25);
}
.landing-btn-primary:hover { background: var(--primary-dark); color: white !important; transform: translateY(-2px); box-shadow: 0 8px 28px rgba(79,70,229,0.35); }
.landing-btn-ghost { background: transparent; color: var(--text-muted) !important; border: 1px solid var(--border); padding: 0.85rem 1.75rem; }
.landing-btn-ghost:hover { background: var(--primary-soft); color: var(--primary) !important; border-color: var(--primary-soft); }

/* Preview card */
.l-preview-card {
    background: var(--surface); border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg); padding: 1.5rem 1.25rem;
    box-shadow: var(--shadow);
}
.l-preview-title { font-size: 1rem; font-weight: 700; margin: 0 0 1rem; }
.l-preview-item {
    display: flex; align-items: center; gap: 0.85rem;
    background: var(--bg); border-radius: 12px; padding: 0.85rem 1rem; margin-bottom: 0.6rem;
}
.l-preview-icon {
    width: 40px; height: 40px; border-radius: 10px; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
}
.l-preview-icon svg { width: 20px; height: 20px; }
.l-preview-label { font-weight: 600; font-size: 0.92rem; margin: 0; }
.l-preview-trust {
    display: flex; align-items: center; gap: 0.5rem;
    margin-top: 0.85rem; font-size: 0.82rem; font-weight: 500; color: var(--success);
}

/* Metrics */
.l-metrics {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.75rem;
    margin-top: 2rem;
}
.l-metric {
    background: var(--surface); border: 1px solid var(--border-soft);
    border-radius: 14px; padding: 1rem; text-align: center;
    box-shadow: var(--shadow-sm);
}
.l-metric-value { font-size: 1.5rem; font-weight: 800; color: var(--primary); letter-spacing: -0.02em; }
.l-metric-label { font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; font-weight: 600; margin-top: 0.15rem; }

/* Steps */
.l-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.l-step {
    background: var(--surface); border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg); padding: 1.75rem 1.25rem; text-align: center;
    box-shadow: var(--shadow-sm);
}
.l-step-num {
    font-size: 0.82rem; font-weight: 800; color: var(--primary);
    margin-bottom: 0.75rem; letter-spacing: 0.05em;
}
.l-step-icon {
    width: 48px; height: 48px; border-radius: 14px;
    background: var(--primary-soft); color: var(--primary);
    display: inline-flex; align-items: center; justify-content: center;
    margin-bottom: 0.85rem;
}
.l-step-icon svg { width: 24px; height: 24px; }
.l-step h3 { font-size: 1rem; font-weight: 700; margin: 0 0 0.35rem; }
.l-step p { font-size: 0.85rem; color: var(--text-muted); margin: 0; line-height: 1.5; }

/* Features grid */
.l-features-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.l-feature-card {
    background: var(--surface); border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg); padding: 1.75rem 1.25rem;
    box-shadow: var(--shadow-sm); transition: all 0.25s;
}
.l-feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--border); }
.l-feature-pill {
    width: 48px; height: 48px; border-radius: 14px;
    display: inline-flex; align-items: center; justify-content: center;
    margin-bottom: 1rem;
}
.l-feature-pill svg { width: 24px; height: 24px; }
.l-feature-card h4 { font-size: 1.05rem; font-weight: 700; margin: 0 0 0.4rem; }
.l-feature-card p { font-size: 0.88rem; color: var(--text-muted); margin: 0; line-height: 1.55; }

/* FAQ */
.l-faq { display: flex; flex-direction: column; gap: 0.5rem; }
.l-faq-item {
    background: var(--surface); border: 1px solid var(--border-soft);
    border-radius: 14px; overflow: hidden;
}
.l-faq-item summary {
    padding: 1rem 1.25rem; font-weight: 600; font-size: 0.95rem;
    cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center;
    transition: background 0.15s;
}
.l-faq-item summary:hover { background: var(--bg); }
.l-faq-item summary::-webkit-details-marker { display: none; }
.l-faq-icon { color: var(--text-muted); font-size: 1.2rem; font-weight: 300; transition: transform 0.2s; }
.l-faq-item[open] .l-faq-icon { transform: rotate(45deg); }
.l-faq-body { padding: 0 1.25rem 1rem; font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }

/* CTA section */
.l-cta-section { padding: 2rem 0 3rem; }
.l-cta-card {
    background: var(--surface); border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg); padding: 2.5rem 2rem;
    box-shadow: var(--shadow);
    display: flex; align-items: center; gap: 2rem; flex-wrap: wrap;
}
.l-cta-body { flex: 1; min-width: 250px; }
.l-cta-body h2 { font-size: 1.5rem; font-weight: 800; margin: 0.5rem 0 0.35rem; letter-spacing: -0.02em; }
.l-cta-body p { color: var(--text-muted); margin: 0; font-size: 0.95rem; }
.l-cta-action { flex-shrink: 0; }

.landing-footer {
    text-align: center; padding: 2rem 1rem; color: var(--text-soft);
    display: flex; flex-direction: column; align-items: center; gap: 0.25rem;
}

/* === INTERVIEW TABS + CARDS === */

.interview-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.interview-tab {
    flex: 1;
    display: flex; align-items: center; justify-content: center; gap: 0.4rem;
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: all 0.15s;
}

.interview-tab:hover { border-color: var(--primary-soft); color: var(--primary); }
.interview-tab.active { border-color: var(--primary); background: var(--primary-soft); color: var(--primary); }

.cv-upload-info {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: var(--primary-soft);
    border-radius: 12px;
    margin-bottom: 1.25rem;
}

/* === INTERVIEW CARDS === */

.interview-card {
    display: flex;
    gap: 1rem;
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 0.75rem;
    box-shadow: var(--shadow-sm);
}

.interview-num {
    width: 36px; height: 36px; flex-shrink: 0;
    border-radius: 10px;
    background: var(--primary-soft);
    color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 0.9rem;
}

.interview-body { flex: 1; min-width: 0; }

.interview-q {
    display: flex; align-items: flex-start; gap: 0.6rem;
    margin-bottom: 0.6rem;
}

.interview-lang-badge {
    flex-shrink: 0;
    padding: 0.15rem 0.45rem;
    border-radius: 6px;
    font-size: 0.65rem;
    font-weight: 700;
    background: var(--primary);
    color: white;
    letter-spacing: 0.03em;
    margin-top: 0.15rem;
}

.interview-lang-badge.en {
    background: var(--success);
}

.interview-lang-badge.sm {
    font-size: 0.6rem;
    padding: 0.1rem 0.35rem;
}

.interview-text {
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text);
}

.interview-answer {
    margin-top: 0.5rem;
    border-top: 1px dashed var(--border-soft);
    padding-top: 0.5rem;
}

.interview-answer summary {
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.interview-answer summary::-webkit-details-marker { display: none; }
.interview-answer summary::before { content: '▸'; transition: transform 0.2s; }
.interview-answer[open] summary::before { transform: rotate(90deg); }

.interview-answer-body {
    margin-top: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.interview-a {
    display: flex; align-items: flex-start; gap: 0.5rem;
    font-size: 0.88rem; color: var(--text-muted); line-height: 1.6;
    padding: 0.75rem;
    background: var(--bg);
    border-radius: 10px;
}

/* Footer bottom bar */
.app-footer {
    padding: 0.75rem 1rem calc(var(--bnav-h) + 1rem);
    text-align: center;
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-soft);
    margin-top: 0.5rem;
}

.footer-bottom small { color: var(--text-soft); font-size: 0.78rem; }

.footer-link {
    color: var(--primary);
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
}
.footer-link:hover { text-decoration: underline; }

.codezzium-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.78rem;
    color: var(--text-soft);
    font-weight: 500;
}

.codezzium-badge img {
    opacity: 0.6;
    transition: opacity 0.2s;
}

.codezzium-badge:hover img { opacity: 1; }

/* === DESKTOP BREAKPOINT === */

@media (min-width: 768px) {
    body { font-size: 16px; }

    .topnav { display: flex; }

    .bottomnav { display: none; }

    .main { padding: 1.75rem 1.5rem 2rem; }

    .stats-grid { grid-template-columns: repeat(4, 1fr); gap: 1rem; }
    .stat-value { font-size: 2rem; }
    .stat-tile-value { font-size: 2.15rem; }

    .actions-grid { grid-template-columns: repeat(4, 1fr); gap: 1rem; }

    .feature-hero { padding: 1.85rem 2.15rem; }
    .feature-hero-title { font-size: 1.85rem; }
    .feature-hero-sub { font-size: 1.02rem; }
    .feature-hero-icon { width: 60px; height: 60px; font-size: 1.85rem; }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.65rem; }

    .hero { padding: 2.25rem 2rem; }

    .chat-wrap { height: calc(100vh - var(--nav-h) - 4rem); }

    .word-head { align-items: center; }
    .word-actions { margin-top: 0; }

    .word-card {
        display: grid;
        grid-template-columns: 1fr 1fr 1.5fr auto;
        gap: 1rem;
        align-items: center;
    }
    .word-card .word-head { display: block; }
    .word-card .word-example { border-top: none; padding-top: 0; margin-top: 0; }

    .l-hero-grid { grid-template-columns: 1.2fr 1fr; gap: 3rem; }
    .l-hero-section { padding-top: 6rem; }
    .l-features-grid { grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
    .l-metrics { grid-template-columns: repeat(4, 1fr); }
    .l-metric-value { font-size: 1.8rem; }
    .l-cta-card { padding: 3rem 2.5rem; }
}

@media (min-width: 1024px) {
    .main { max-width: 1040px; }
    .topbar-inner { max-width: 1040px; }
}

@media (max-width: 767px) {
    .chat-layout { grid-template-columns: 1fr; }
    .chat-sidebar {
        position: fixed;
        top: var(--nav-h);
        left: 0;
        width: 85%;
        max-width: 320px;
        height: calc(100vh - var(--nav-h));
        max-height: none;
        z-index: 40;
        transform: translateX(-100%);
        transition: transform .2s;
        border-radius: 0;
    }
    .chat-sidebar.open { transform: translateX(0); }
    .chat-sidebar-toggle { display: inline-flex; }
}

/* ========= FEATURE THEME SYSTEM ========= */

.feature-hero {
    position: relative;
    border-radius: var(--radius-lg);
    padding: 1.5rem 1.75rem;
    color: white;
    margin-bottom: 1.25rem;
    overflow: hidden;
    box-shadow: 0 14px 40px -12px rgba(15, 23, 42, 0.25);
}

.feature-hero::before,
.feature-hero::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    filter: blur(20px);
    opacity: 0.6;
}

.feature-hero::before {
    width: 220px; height: 220px;
    top: -80px; right: -60px;
    background: rgba(255, 255, 255, 0.3);
}

.feature-hero::after {
    width: 180px; height: 180px;
    bottom: -80px; left: -40px;
    background: rgba(255, 255, 255, 0.22);
}

.feature-hero > * { position: relative; z-index: 1; }

.feature-hero.theme-interview { background: var(--theme-interview); }
.feature-hero.theme-wordbank { background: var(--theme-wordbank); }
.feature-hero.theme-vocabulary { background: var(--theme-vocabulary); }
.feature-hero.theme-topics { background: var(--theme-topics); }
.feature-hero.theme-chat { background: var(--theme-chat); }
.feature-hero.theme-quiz { background: var(--theme-quiz); }
.feature-hero.theme-dashboard { background: var(--theme-dashboard); }

.feature-hero-title {
    font-size: 1.6rem;
    font-weight: 800;
    margin: 0;
    letter-spacing: -0.02em;
    color: white;
    line-height: 1.15;
}

.feature-hero-sub {
    margin: 0.35rem 0 0;
    font-size: 0.95rem;
    opacity: 0.92;
    color: rgba(255, 255, 255, 0.95);
}

.feature-hero-icon {
    width: 52px; height: 52px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 14px;
    backdrop-filter: blur(10px);
    font-size: 1.6rem;
}

.feature-hero-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.feature-hero-meta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.75rem;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 100px;
    font-size: 0.82rem;
    font-weight: 600;
    color: white;
    backdrop-filter: blur(8px);
}

/* ========= STAT-TILE (vibrant) ========= */

.stat-tile {
    position: relative;
    border-radius: var(--radius);
    padding: 1rem 1.1rem;
    color: white;
    overflow: hidden;
    box-shadow: 0 6px 20px -8px rgba(15, 23, 42, 0.2);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    min-height: 92px;
    display: flex; flex-direction: column; justify-content: space-between;
    gap: 0.4rem;
}

.stat-tile:hover { transform: translateY(-3px); box-shadow: 0 14px 30px -10px rgba(15, 23, 42, 0.28); }

.stat-tile::after {
    content: '';
    position: absolute;
    top: -30px; right: -30px;
    width: 100px; height: 100px;
    background: rgba(255, 255, 255, 0.18);
    border-radius: 50%;
    pointer-events: none;
}

.stat-tile > * { position: relative; z-index: 1; }

.stat-tile-label { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; opacity: 0.9; }
.stat-tile-value { font-size: 1.9rem; font-weight: 800; line-height: 1; letter-spacing: -0.02em; }
.stat-tile-sub { font-size: 0.78rem; opacity: 0.85; font-weight: 500; }

.stat-tile.theme-indigo { background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%); }
.stat-tile.theme-pink { background: linear-gradient(135deg, #ec4899 0%, #a855f7 100%); }
.stat-tile.theme-teal { background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%); }
.stat-tile.theme-green { background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%); }
.stat-tile.theme-amber { background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%); }

/* ========= FEATURE-CARD (rich colored action card) ========= */

.feature-card {
    position: relative;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.1rem 1.25rem;
    border-radius: var(--radius);
    color: white;
    text-decoration: none;
    overflow: hidden;
    box-shadow: 0 10px 28px -10px rgba(15, 23, 42, 0.2);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 36px -10px rgba(15, 23, 42, 0.3);
    color: white;
}

.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(110deg, transparent 40%, rgba(255,255,255,0.18) 50%, transparent 60%);
    transform: translateX(-100%);
    animation: hero-cta-shimmer 5s ease-in-out infinite;
    pointer-events: none;
}

.feature-card > * { position: relative; z-index: 1; }

.feature-card-icon {
    width: 44px; height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    flex-shrink: 0;
}

.feature-card-icon svg {
    width: 22px; height: 22px;
    stroke: white; fill: none; stroke-width: 2;
    stroke-linecap: round; stroke-linejoin: round;
}

.feature-card-body { flex: 1; min-width: 0; }
.feature-card-title { font-weight: 700; font-size: 1rem; color: white; letter-spacing: -0.01em; }
.feature-card-sub { font-size: 0.82rem; opacity: 0.9; margin-top: 0.1rem; }

.feature-card-arrow {
    flex-shrink: 0;
    width: 32px; height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    color: white;
    font-size: 1.1rem;
    font-weight: 700;
    transition: transform 0.2s ease, background 0.2s ease;
}

.feature-card:hover .feature-card-arrow {
    transform: translateX(3px);
    background: rgba(255, 255, 255, 0.32);
}

.feature-card.theme-interview { background: var(--theme-interview); }
.feature-card.theme-wordbank { background: var(--theme-wordbank); }
.feature-card.theme-vocabulary { background: var(--theme-vocabulary); }
.feature-card.theme-topics { background: var(--theme-topics); }
.feature-card.theme-chat { background: var(--theme-chat); }
.feature-card.theme-quiz { background: var(--theme-quiz); }

.feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

@media (min-width: 640px) {
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ========= INFO CHIP / BADGE ========= */

.chip {
    display: inline-flex; align-items: center; gap: 0.35rem;
    padding: 0.28rem 0.7rem;
    border-radius: 100px;
    font-size: 0.78rem;
    font-weight: 600;
    background: var(--primary-soft);
    color: var(--primary);
    border: 1px solid rgba(79, 70, 229, 0.15);
}
.chip.theme-pink { background: var(--theme-interview-soft); color: #db2777; border-color: rgba(236, 72, 153, 0.2); }
.chip.theme-green { background: var(--theme-wordbank-soft); color: #059669; border-color: rgba(16, 185, 129, 0.2); }
.chip.theme-amber { background: var(--theme-vocabulary-soft); color: #d97706; border-color: rgba(245, 158, 11, 0.25); }
.chip.theme-teal { background: var(--theme-chat-soft); color: #0891b2; border-color: rgba(6, 182, 212, 0.25); }

/* ========= SECTION DIVIDER ========= */

.section-divider {
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.2), transparent);
    margin: 1.5rem 0;
    border: none;
}

/* Override page-header h2 color for themed pages */
.page-header.theme-interview h2 { background: var(--theme-interview); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
.page-header.theme-wordbank h2 { background: var(--theme-wordbank); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
.page-header.theme-vocabulary h2 { background: var(--theme-vocabulary); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
.page-header.theme-topics h2 { background: var(--theme-topics); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
.page-header.theme-chat h2 { background: var(--theme-chat); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
.page-header.theme-quiz h2 { background: var(--theme-quiz); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }

/* Rich empty state */
.empty {
    text-align: center;
    padding: 2.5rem 1.5rem;
    background: linear-gradient(145deg, rgba(255,255,255,0.9), rgba(245, 243, 255, 0.9));
    border: 1px dashed rgba(139, 92, 246, 0.25);
    border-radius: var(--radius-lg);
    margin: 1rem 0;
}

.empty-icon {
    font-size: 3rem;
    line-height: 1;
    margin-bottom: 0.5rem;
    filter: drop-shadow(0 4px 12px rgba(139, 92, 246, 0.3));
}

.empty p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 1rem; }


/* ========= LEVELENAI LOGO ========= */

.levelenai-svg { max-width: 100%; }

/* When logo sits on a dark/gradient hero — turn everything white */
.levelenai-on-dark .levelenai-svg text,
.levelenai-on-dark .levelenai-svg path,
.levelenai-on-dark .levelenai-svg line,
.levelenai-on-dark .levelenai-svg rect {
    fill: #ffffff !important;
    stroke: #ffffff !important;
}
.levelenai-on-dark .levelenai-svg circle { fill: rgba(255,255,255,0.8) !important; }
.levelenai-on-dark .levelenai-svg text tspan { fill: #ffffff !important; }

/* === INSTALL GUIDE === */
.install-tab {
    flex: 1;
    padding: 0.6rem 0.8rem;
    background: transparent;
    border: none;
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s;
}
.install-tab:hover { background: var(--primary-soft); color: var(--primary); }
.install-tab.is-active {
    background: var(--primary-soft);
    color: var(--primary);
}
.install-steps {
    list-style: none;
    counter-reset: step;
    padding: 0;
    margin: 0 0 1.25rem 0;
}
.install-steps li {
    counter-increment: step;
    position: relative;
    padding: 0.75rem 0 0.75rem 3rem;
    border-bottom: 1px solid var(--border-soft);
    line-height: 1.5;
}
.install-steps li:last-child { border-bottom: none; }
.install-steps li::before {
    content: counter(step);
    position: absolute;
    left: 0; top: 0.75rem;
    width: 2rem; height: 2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--theme-dashboard);
    color: #fff;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.9rem;
}
.install-screenshot {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 0 auto;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

/* === INSTALL BANNER === */
.install-banner {
    position: fixed;
    left: 0.75rem;
    right: 0.75rem;
    bottom: calc(var(--bnav-h) + 0.75rem);
    z-index: 900;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    padding: 0.85rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    animation: installSlideUp 0.35s ease-out;
}
.install-banner[hidden] { display: none; }
@keyframes installSlideUp {
    from { transform: translateY(120%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
.install-banner-icon {
    width: 38px; height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-soft);
    border-radius: 12px;
    font-size: 1.3rem;
    flex-shrink: 0;
}
.install-banner-text {
    flex: 1;
    min-width: 0;
    font-size: 0.9rem;
    line-height: 1.35;
}
.install-banner-text strong { display: block; font-weight: 700; }
.install-banner-text small { color: var(--text-muted); font-size: 0.78rem; }
.install-banner-cta {
    padding: 0.5rem 0.9rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    text-decoration: none;
}
.install-banner-close {
    width: 32px; height: 32px;
    background: transparent;
    border: none;
    color: var(--text-soft);
    font-size: 1.2rem;
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.install-banner-close:hover { background: var(--border-soft); color: var(--text); }
@media (min-width: 768px) {
    .install-banner { display: none; }
}